A job interview is an avenue for a company to examine if your skills and experience are perfect for the job. It is also a good opportunity to see if you suit the company. You would be interested to know more about the company and how they operate. You can get answers from the interview so you should be prepared to ask questions from the interviewer yourself. Whatever question you want to ask, make sure it is relevant to the company and position.
If you can't think of any questions you'd like to ask, here are a few and why you should ask them.

What is it like working for this company?
You would want a company that matches your intellectual capacity. You would also be interested on how they treat their employees. This kind of question is a way to know what to expect and if you don’t get a positive response, rethink.

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http://www.smarthow.net/2012/06/four...interview.html